debugger_gcc <ashay.raut@xxxxxxx> writes: > For the scenario where i declare a variable as > int \uA0A0; // in a C program > > i get an error with message > error: universal character \uA0A0 is not valid in an identifier > when compiled using gcc-4.4.1 on linux. > > However C99 standards specify only the following constraints on universal > characters : > > Section 6.4.3 ISO/IEC 9899:TC3 > " A universal character name shall not specify a character whose short > identifier is less than > 00A0 other than 0024 ($), 0040 (@), or 0060 (‘), nor one in the range D800 > through > DFFF inclusive.62) " > > so why doesnt gcc 4.4.1 throws an error saying "its not valid in an > identifier"? > Does gcc enforce some additional constraints regarding the usage of > universal character in C program? Those are not the only constraints; section 6.4.2.1 restricts character names in an identifier to be in one of the ranges in C99 Annex D. Annex D does not permit A0A0. Ian
